The polygraph test is based on the assumption that when people lie, they will show an increase in

A) blood flow to the prefrontal cortex.
B) digestive activities and salivation.
C) movements of the hand and food muscles.
D) heart rate, breathing rate, and sweating.

Heart Rate

The count of heart pulsations within a specific time frame, usually measured in beats per minute (BPM).

Sweating

The release of a saline fluid from the body's sweat glands, typically in response to heat, physical exertion, or stress, as a means of regulating body temperature.